LED light-emitting diode in Chinese meaning is a kind of energy into visible light to the semiconductor, it changes the energy-saving lamps and incandescent tungsten light emitting three basic principles of toner. LED light with the electric field. According to the analysis, LED is very obvious characteristics, long life, high luminous efficiency, no radiation and low power consumption. LED spectrum is almost all concentrated in the visible light spectrum, the luminous efficiency of more than 150lm / W (2010 years). The LED and incandescent, spiral energy-saving fluorescent lamps and T5 compared the three primary colors, diameter of 5 mm white LED light effect can be more than 150lm / W, life can be greater than 100,000 hours. It was also predicted that the future of LED lifetime limit will be infinity. Although LED long life, but it is very practical skills, is if you use the wrong way, LED also fail. In general, LED's power, but the same heat is also great, and now LED flashlight is generally used by low-power, light scattered dispersed, depending on the angle LED's light, there is a wide angle small angle of the points, small-angle dispersed, only scattered large angle. Flashlight market is generally done with a straw hat head, very good. If you do take the defective LED flashlight, before long is the death of light.